Gonio Lenses

Gonioscopy is a diagnostic procedure performed to evaluate the health of the anterior chamber angle. The anterior chamber angle of the eye is where the cornea meets the iris and it is at this junction where the intraocular fluid is exchanged between the anterior and posterior chamber. The angle structures (Angle structures= 1. Schwalbe’s line+2. Anterior and posterior trabecular meshwork+3. Scleral spur+ 4. Ciliary body+ 5. Iris root) cannot be viewed directly due to optical obstructions stemming from the tear-air interface.  Thus, a gonio lens is required to enable visualization of the angle. A gonio lens consists of mirrors angled precisely within the lens body to redirect the light so practitioners can visualize and examine the angle structures. The anterior chamber angle is responsible for maintaining intraocular fluid equilibrium. Abnormalities of the angle structures can result in unhealthy pressure changes inside the eye leading to serious vision damage if left undiagnosed and untreated. The gonioscopy examination is therefore an extremely vital procedure for:

  • Glaucoma diagnosis and treatment
  • Post traumatic ocular examination
  • Examination and monitoring ocular hypertension post chamber angle surgery